Alexander mckerlie



(No Model.)

A. MOKERLIE. WINDOW SCREEN.

No. 484,540. Patented Oct. 18, 1892;

UNITED STATES PATENT OFFICE.

ALEXANDER MCKERLIE, OF HAMILTON, CANADA.

WIN DOW-SCREEN.

SPECIFICATION forming part of Letters Patent No. 484,540, dated October 18, 1892.

Application filed April 27, 1892. fierial No. 430,890. (No model.) Patented in Canada March 14, 1892, No. 38,474.

To all whom it may concern:

Be it known that I, ALEXANDER MCKERLIE, a citizen of Canada, residing at Hamilton, in the county of VVentworth, Province of Ontario, Canada, have invented a new and useful Window-Screen, (for which I have obtained a patent in Canada, No. 38,474, bearing date March 14, 1892,) of which the following is a specification.

My invention relates to improvements in window-screens, in which a vertical metallic tube or casing having a vertical slot almost its entire length and an adjustable telescopic cover are arranged and devised to contain a vertical roller provided with a screen fabric rolled around said roller that when operated upon the said roller receives a certain tension from a spiral spring which is attached to the upper part thereof, the whole beingincased in said vertical tube and its cover; and the objects of my improvements are, first, to provide a fabric window-screen which is capable of extension across any ordinary window-frame or door; second, to afiord facilities for the proper adjustment and manipulation of the same, and, third, when preferable to allow the device to be attached to the opposite side of said window-frame, thus be-- ing a reversible windowscreen. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure l is a front elevation of a windowscreen attached to and opened out in position across the framework of awindow. Fig. 2 is an enlarged front sectional elevation of the device, showing the screen partially drawn out; and Fig. 3 is an elevation of the detached cover.

Similar letters refer to similarparts throughout the several views.

The framework around the window, as delineated, is indicated by A, in which a window-sash a vertically slides.

B is a vertical metallic tube or casing of any desired length and is secured to the said frame by means of the lugs B. The adjustable telescopic cover E fits over a certain distance, in telescopic fashion, the upper end of said tube and is provided with an inner tube and socket F in a central position, in which the upper shank end of the vertical roller I is incased. The lower shank end of said roller fits into the socket B which is situated in the lower end of said tube. The spiral spring S is coiled around said inner tube F of cover E and fastens at its upper stationary end to the upper part or top of said cover at H, and its rotating lower end fastens to the upper part of vertical roller at J, immediately below the lower end of said inner tube. This spiral spring exerts a sufficient rotary power to the vertical roller to enable it to afford the proper tension and firmness to the fabric screen C when drawn out, as delineated in Fig. 1, and force sufficient to draw the said screen back upon its roller when released at its outer rod end D by its button or lug C from the window-frame. In order to prevent the cover of said tube from moving when tension is upon the spring, one or two suitable right-angled apertures e are provided in the lower end of the cover, which when in position is locked by means of a projecting pin or pins on the upper part of tube to correspond to position of said apertures, thus locking and unlocking by slightly turning the cover, thus allowing the cover to be removed when necessary.

The composition of the screen fabric may be of suitable material to answer the purpose, as described, and the width of the vertical slot C in tube may be very slight, so as to correspond to the thickness of screen to allow the same to operate freely.

To reverse the screen, it is merely attached to the opposite side of the frame Aby means of screws through the said lugs B, as delineated in Fig. 1. The device operates freely on either side of frame, this being an important feature in this device.

Another important feature and element in my improvement is that this screen can be most conveniently applied to any breadth of window and also be maintained at a proper tension; also, the same can be easily adjusted to or removed from and applied to different windows or doors, when necessary, without the least detriment to the general woodwork thereof.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination, in a reversible windowscreen, of the: vertical tube B, havingvertical end fastened to said cover at H, the rollerslot C to act as an opening toallow screen 0 screen 0, and its strengthening-rod D, pro- 10 to operate and provided with lugs B to fasvided with fastening-lug 0 substantially as ten said tube to window-frame A, and teledescribed and set forth.

5 scope-cover E, having inner tube with socket ALEXANDER MGKERLIE.

F, and the lower socket B to support vertical Witnesses: screen-roller I, the spiral spring H, its lower JOHN WILSON,

end fastened to said roller at J and its upper l R. G. HAY. 

